Sept. 8: Sabrina McLean, a 54-year-old mother of five, was found after being run over by a tow truck that had backed into a garage on Frederick Douglass Avenue. Three months later, George Rhodes Jr., 48, a homeless man, is charged with murder.

April 22: Vardly St. Felix, 23, was shot dead and Stanley Damestoire, 28, was wounded in a brazen daytime shooting behind the Angelo Elementary School. Carlens Alain Louis, 24, of Taunton, is charged with the shooting, which occurred as the nation paused to remember the Boston Marathon one week to the minute earlier.

Dec. 29, 2012: Tashawn Leslie, above left, and Tyerelle Baker, both 23 and of Brockton. were shot to death as they sat in a car on Battles Farm Drive. Guerry Hickman, 25, has been charged with the murders.

Feb. 13: The bodies of Maria Avelina Palaguachi-Cela, 25, and her son, Brian Cuanga Palaguachi, 2, are found in a trash bin on Warren Avenue. Suspect Luis Guaman is serving three years prison in Ecuador for identity theft and immigrations law violations.

Eliezer Mendes of Brockton was discovered lying in the road outside a home on Winthrop Street after police received multiple calls at 2:09 a.m. Monday. He was transported to a local hospital and pronounced dead a short time later.

A 23-year-old Brockton man was killed in a drive-by shooting Saturday afternoon. Wilson Pires was standing next to the front porch on Nye Avenue shortly before 2:45 on Saturday afternoon when he was struck by shots fored from a passing car.

The man fatally shot in a Nilsson Street driveway had witnessed the slaying of a 23-year-old man on Hancock Street last month and may have had information about the killing of a brother and sister a few days later, sources said. Manuel Rodrigues, 32, was shot to death the day before a scheduled probable cause court hearing in the Hancock Street case.

Manuel Rodrigues, 32, was shot multiple times near the rear porch of a home, the fifth person slain so far in the city and the third on Nilsson Street. Plymouth County District Attorney Timothy J. Cruz said an autopsy will determine the cause of death and how many times the victim was shot.

Extra Brockton and state patrols hit the streets on Friday to stem further violence while detectives try to learn who killed Maria DePina, 29, and her 26-year-old brother, Jorge, at their home in Campello.

State and local investigators continued the hunt for leads in the slayings of Maria and Jorge DePina, as more police hit the streets to calm residents and prevent any further violence. Mayor Linda Balzotti said officers are working overtime patrols and other units are targeting “hot spots” in the city.

With the rash of murders and shootings that have gripped Brockton in recent weeks, even longtime residents have lost their sense of security. “I don't feel safe anymore,” said Adilson Foseca, 29, who has lived for the past four years a few blocks away from where Thursday's slayings happened.

The community prayer vigil was planned more than a month ago to mark the anniversary of the racially motivated murder of two Cape Verdean residents by accused gunman Keith Luke. But the event took on new significance Thursday morning with the murder of two young Brockton residents in the city's Nilsson neighborhood.

Mayor Linda Balzotti said city police are shifting patrols and will bring in extra officers on overtime if needed to quell any escalating gang violence in the wake of Thursday's two killings. State police are also beefing up street patrols.

The arrest of Michael Barros, 24, of Lawrence Street, Brockton, in the Jan. 17 slaying of Moises Vicente, 23, of Attleboro, comes as state and local police are stepping up patrols throughout the city to try to end the escalating gun violence in the city.